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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '86bf4a96dcb8f557fe6dc225fc456bca6a5f2d3b7525aa7ca9c114ba5661d4aa' 
  AND token = 'GxDVa8zmte1DPorxMEt9gdJgEg1//ewPm87EtcYqhK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}